Scan Speak Illuminata 18 Beryllium floorstanding loudspeaker Kit with high-end crossover

Kit with high-end crossover without housing price per speaker

Illuminata 18BE/RD is a compact, very broadband high-end floor-standing loudspeaker that contains a Scan-Speak woofer 18WU8741T00. We offer the kit in three different versions, which the magazine Hobby HiFi has developed. The versions differ in the tweeter, which you can choose from below: the excellent beryllium tweeter Scan-Speak D3004/664000, the ring radiator from the Illuminator series Scan-Speak R3004/662000 or the inexpensive ring radiator from the Discovery series Scan-Speak R2604/833000 The loudspeaker was developed by Bernd Timmermanns. The loudspeaker is designed with a closed housing and high-pass capacitor (GHP). The crossover consists of a 3rd order high-pass filter (18 dB/octave) for the tweeter dome or the ring radiator. A 2nd order low pass drives the woofer/midrange speaker. Two suction circuits smooth out the frequency response of the woofer/midrange speaker. A capacitor is also connected in series with the woofer. The frequency response of the loudspeaker is perfectly linear on axis between 50 Hz and 40,000 Hz. The decay spectrum is free of any interference. The non-linear distortions at medium volumes (90 dB, 1m) are below 0.25% above 300 Hz.

The high-end kit contains three Mundorf EVO silver-gold oil capacitors in series with the tweeter. Most of the coils are designed as baked varnish air coils. A Mundorf CFC foil coil is used in series with the woofer; both to reduce the microphonic effect (The current through the coil generates a magnetic field, which in turn sets the winding in motion. This movement induces voltages in the coil, which are added to the useful signal. The tighter the winding of the coil, the less the useful signal is distorted.)

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Technical data:

• Impedance: 6 Ohm
• Sound pressure level (2.83V/1m): 82 dB
• Dimensions (HxWxD): 750 x 200 x 280 mm
• Frequency range (-8dB): 35 - 40000 Hz
• Crossover frequency(s): 2000 Hz
• Principle: closed box

Highlights

• ScanSpeak Illuminator D3004/6640-00, Beryllium, 1/2 pack
• ScanSpeak midrange speaker 18WU8741T00, 8 Ohm
• Insulating fleece MT Bondum 800 (30 x 50 x 2 cm)
• 0.5x PE foam sealing strip, 5x2 mm, roll 7.5 m
• Insulating material Sonofil 100 x 35 cm for 20 liters
• Pole terminals PK31, one pair, gold-plated, red+black
• 3m speaker cable 2x2.5 mm2, transparent
• 1.5x Pan screws 4x20 black, Phillips, 8 pieces
• Construction plan for the kit the crossover components (right), to be assembled on a small wooden board.
• Mundorf MCAP EVO oil 68 μF / 350 V
• Mundorf MCAP EVO silver gold oil 0.33 μF / 450 V
• Mundorf MCAP EVO silver gold oil 4.7 μF / 450 V
• Mundorf MCAP EVO silver gold oil 15 μF / 450 V
• ClarityCap PWA capacitor 100 μF / 160 Vdc
• Audaphon MKP CAP Superior 15 μF / 400 Vdc
• Elko smooth, 33uF / 70 Vdc
• Elko smooth, 47uF / 50 Vdc
• Elko smooth, 68uF / 50 Vdc
• 2x Elko smooth, 100uF / 50 Vdc
• Mundorf foil coil CFC14-2.2mH/0.41Ohm
• Mundorf baked varnish air coil BL71, 0.39 mH/0.51 Ohm
• Mundorf baked varnish air coil BL71, 1.5 mH/1.13 Ohm
• Mundorf baked varnish air coil BL71, 22 mH/5.66 Ohm
• Metal oxide resistor MOX10 5.6 Ohm (green-blue-gold)
• Metal oxide resistor MOX10 10 Ohm (brown-black-black)
• Metal oxide resistor MOX5 3.9 Ohm (orange-white-gold)
• Metal oxide resistor MOX5 6.8 Ohm (blue-gray-gold)